Oil burning apparatus



2 Sheets-Sheet 1 K. MURAKI 01L BURNING APPARATUS filedlMay 27, 19:51

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March 26, 1935. K, MURAKI OIL BURNING APPARATUS Filed May 27, 1931 2 Sheets-Sheet 2 g'rwenloi K J/Eo Mug 9 K] Patented Mar. 26, 1935 I Y f UNITED STATES PATENT OFFICE on. nualsnztfiraaarus Kojiro Muraki, Aza Nishi, Otsumura, Japan ADP cation; lsglhlzzfzlsl o. 540,315

This invention relates to an oil burning appatank 1. A portion of the pipe 6 forms coils surratus which may be used in many types of in rounding an oil injection nozzle 12 which. is sitdustrlal furnaces. uated in the middle of a chamber '7 formed by One feature of the invention consists in the the walls of ahollow casing 8. Another chamber provision of an oil burning apparatus compris- 14 is formed by the walls of a cover .17 and a 5 mg an annulus enclosing an oil injection nozzle hollow casing 18. The air is introduced into the and having walls which are inclined from the chamber 14 through openings 13 formed on the middle towards the ends, one end of the annulus periphery of the-casing 18. having a contracted open mouth, while a number The pipe 6 is connected with a pipe 9 which 10 of ir adm ssion ports are provided at the oppoconducts fuel oil into the oil injection nozzle 12. 10 e site inclined wall thereof. A plurality of spiral A box 10 serves asa cover for an adjusting vanes or partition walls are used to form spiral. device which actuates a regulating spindle 30 passages between the air admission ports and the (Fig. 5). The spindle 30 passes through a packcontracted open mouth to enable the admitted ing 32 which is mounted adjacent to the rear air to swirl rapidly and to break up the oil parend of the oil injection no le e l' l5 t cles projected from the oil injection nozzle as im; device comprises a worm wheel 29 which is a fine spray. keyed on the spindle 30 and which is geared with Due to this arrangement the fuel oil is very a Worm on a spindle 36 actuated y a handle thoroughly mixed with the admission air so that e ulating spindle 30 is moved lon complete combustion can take place, and a very tud nally by the revolution of the worm wheel 29. 20

large and strong flame can beprovided at the A eehieel d 33 0f the Spindle 30 fits in a contracted open mouth. This flame can be made conical bore of a member 27 screwed into the forstill larger by the provision of a partition wall ward end of the oil injection nozzle 12 and proand the formation of vacuum in a space between Vided h an Op the Passage of the said wall and an inclined wall of the annulus. The Spindle h a plurality Of grooves 34 25 I The length of the flame may be adjusted by' vided along a suitable length thereof, beginningvarying the amount of oil passing through the oil rom i s c n al nd 33. h r v s 3 ve injection nozzle and by changin th di t n for the passage of oil to the mouth of the nozzle. between the mouth of the oil injection nozzle and An a nulu 15 s ro n s he mo h f h i 30 the contracted open mouth of the annulus. in c i nozzle 12 a is provided with Wells 30 Another feature of this inventi is t prewhich are inclined from the middle of the annuliminary heating of air flowing toward the adlus toward the ends thereof. A contracted open mission ports of the annulus. The fuel oil is mouth 23 is formed at the forward end of the also heated on its way to the oil injection nozzle. annulus While a nu b o air admission Ports 35 An embodiment of the present inv ti is 22 are provided at the rear wall of the annulus. 35 illustrated in'the annexed drawings, in hich; The neck 24 of the annulus 15 is loosely fitted on Figure 1 is an elevation, partly in section, of the member 80 that the annulus 15 y e the apparatus connected with the fuel oil tank. m v h y wi r p to h oil inj ion Figure 2 shows in section the flame blowi g nozzle 12 to adjust the length of the flame; for

40 annulus provided with walls converging from the that p p se, the annulus 15 is provided with a 40 middle towards the ends thereof. projection 25 formed on the rear wall of the an- Figure 3 is an end view of the annulus, nulus and connected with a rod 40 which is pro- Figure 4 shows the annulus in perspective with vi d wi h an op ra n han e 28.

parts cut away. A number of spiral vanes or partitions 16 are Figure 5 is a section through the oil injection provided within the annulus 15 and are arranged 45 nozzle. in the form of spiral passages leading from the Figure 6 shows the nozzle in elevationiand the air' admission ports 22 to the mouth 23, so that annulus and the casing in vertical section, suction is exerted on the air passing through The device illustrated in the drawings come p Passagesprises a pressuretank 1 containing the fuel oil Th an ulus 5 is sur d y a cover 7 50 and a feed pump 2 which is connected by a and a casing 18. The casing 18 is hinged to a.

pipe 3 with an oil reservoir not shown in the drawflange of the casing 8 and is tightened by a pivings. The pump 2 feeds the fuel oil into the otal bolt 26 and a nut 21.

pressure tank 1 through the pipe 4. A pressure The cover 17 and the casing 18 are detachably 65' gauge 5 and a feed pipe 6 are connected to the connected at their flanges. The cover 17 is curved for the purpose of enlarging the flame. Air admission ports 13 provided in the casing 18 lead to the chamber 14, formed by the outer walls of the casing 18 and the cover 17, and by inner partition walls 19 and 38, forming parts of the cover 17 and the casing 18, respectively. Openings or perforations 39 connect the chamber 14 with the chamber '7;

The oil burning apparatus is used in the following manner:

The pump 2 is worked first and the fuel oil is fed into the oil injection nozzle 12 through the pipes 6 and 9 from the tank 1. As soon as the oil spray is injected, the oil and air mixture is ignited, and the air coming through the air admission ports 13 of the casing 18 passes through the spiral passages of the annulus 15.

It is to be observed from the description and drawings, that the spiral passages not only cause suction, but also produce a centrifugal force acting upon the flame, so that the length of the flame may be made very great. A vacuum is developed between the front inclined wall of the annulus l and the partition wall 19 of the cover 17 due to the withdrawal of air, the flame being outwardly enlarged along the surface of the cover 17.

The length of the flame may be adjusted at will by regulating the quantity of the fuel oil passing through the member 2'7 carried by the oil injection nozzle 12, by means of the regulating spindle 30 which may be moved by the worm wheel 29 and the worm 35 operated by the handle 11, and also by adjusting the distancebetween the member 2'7 and the open mouth 23 of the annulus 15 by moving said annulus by means of the handle 28.

Furthermore, by means of this invention it is possible to mix thoroughly the atomized oil with a stream of hot air and to obtain complete combustion, because oil projected against the spiral vanes 16 is broken up into minute particles which are caught by the air stream.

The air entering the chamber 14 through the ports 13 is heated while it passes around the partition wall 38 and is also heated in the chamber 7 into which it penetrates through the openings 39, so that hot air is introduced into the annulus 15. The fuel oil passing through the coils of the pipe 6 within the chamber '7 is also heated. Due to this arrangement the process of atomizing the oil is improved to a considerable extent.

What I claim and desire to secure by Letters Patent is:

1. An oil burning apparatus, comprising an oil injection nozzle, means connected with said oil injection nozzle for feeding oil to said nozzle, a casing surrounding and carrying said oil injection nozzle, an annulus mounted on said oil injection nozzle and comprising a wall converging toward both ends of said annulus, said annulus having air admission openings formed close to said oil injection nozzle, spiral partitions within said annulus forming spiral passages for air and oil mixture, another casing surrounding said annulus and connected with the first-mentioned cas' ing, and an inner partition wall situated within the second-mentioned casing and connected therewith, the second-mentioned casing having openings, whereby air is admitted to the space between said partition wall and the second-men- I tioned casing and is discharged into the firstmentioned casing.

' 2. An oil burning apparatus, comprising an oil injection nozzle, means connected with said oil injection nozzle for feeding oil to said nozzle and for regulating the amount of oil flowing through said nozzle, a casing surrounding and carrying said oil injection nozzle, an annulus mounted on said oil injection nozzle and comprising a wall converging toward both ends of said annulus, said annulus having air admission openings formed close to said oil injection nozzle, spiral partitions within said annulus forming spiral passages for air and oil mixture, another casing surrounding said annulus and connected with the first-mentioned casing, an inner partition wall situated within the second-mentioned casing and connected therewith, the second-mentioned casing having openings, whereby air is admitted to the space between said partition wall and the second-mentioned casing and is discharged into the first-mentioned casing and means connected with said annulus for moving the same relatively to said oil injection nozzle.

KOJIRO MURAKI 

